Post #70: Report on the New Weapons Board

I downloaded this PDF, Report on The New Weapons Board 1944, someplace, but since I don’t remember where I hosted it too. The report documents the feedback the troops gave to the board on the various weapons they demonstrated.

The report was put together in early 44 to document feedback from the troops on current weapons, and proposed improvements, and replacements. There is a good amount of information on the M4 medium tank, and US Armor in general. Most of the combat feedback comes from the fighting in Italy, and North Africa.

The report also sheds an interesting light and gives evidence for the view that the US Army didn’t consider the improved early Sherman bad, and only wanted it replaced with something much better. It also gives some interesting insight into the Shermans and what condition they were in when they got to the using units.

Feedback on current equipment and changes.

This is a typical M4 Sherman in Italy, the battalion is being used as an artillery battery, and this is an early production M4 with the M34 gun mount and it probably has a three-piece differential as well. It may even have DV ports. These tanks were common in the MTO even into 1944.

The first thing is this to note about the Sherman is the first mention of it is praise for the current models. This quote stands out, “No new type is desired unless the improvement in military characteristics is sufficient to warrant the changes and defects in the present standard tanks are avoided.”

Another early model M4 in Italy, cheek armor, M34 gun mount, and an early 3 piece differential.

They did have a list of improvements they did want either done to the Sherman and to make sure the follow-on model, the T20 series incorporated them.

They wanted a 76mm gun like the 3-inch gun on the M10. The news of the 76mm M1 series and the new Shermans mounting the gun interested the troops a lot. They brought an M4E6 76mm Sherman to show to the troops.

Improved suspension and tracks. It turns out the rubber block tracks with no chevron were not well liked and wore out very quick in rocky, hilly terrain. The steel chevron blocks with rubber backs were well like and lasted much longer. This feedback is mostly from the MTO, the mountainous and rocky landscape was hard on tanks and even the Sherman had some issues. The complaints about the suspension had more to do with width than durability.

They wanted armored air cleaners on the M4 and M4A1 tanks. It turns out the Air cleaners mounted under the overhang on the rear hull of the M4 and M4A1 tanks were prone to damage, and this damage was not expected and didn’t pick up until Italy so there was a shortage. All other models had the air cleaners inside the hull. Some units added improvised armor and some were added later in the production runs.

Better ballistic angle around the front of the transmission housing. The old three-part differential is what they are talking about. Most early Shermans had this type, and the armor was thinner than the later cast single piece units. There were two cast versions, an early thinner, but still no worse than the three-piece unit, and a later improved thicker one. There was a demand for add-on armor over this area, but it was never approved.

More power. Yet, when the M4A3 Ford GAA powered Shermans came online, they did not want to swap them in as replacements, and only wanted whole units who trained on them stateside first to be issued the improved tanks. The M4A4 and M4A2 were not big enough improvements to switch to those motors.

Diesel engine. The US Army rejected the GM 6046, claiming it was not as reliable as the R975, but all the nations that did use this motor liked it.

They wanted better sights and fire control equipment. Many tanks in the MTO and NATO(North African Theater of Operation) had not gotten the M34A1 gun mounts with telescopic sights. The mount for the periscope sight had not seen major improvements, though there were field mods to make it work. The using arm was enthusiastic about the changes in the second gen Shermans fire control, but wanted even more advanced features, like rangefinders, and improved telescopes, since the current ones shot loose too!

There is also other tank related info.

The M3 75mm Gun – Though well-liked for infantry support and deemed to be reliable and durable, the using arms almost universally felt the German 75mm PAK 40 guns were much better anti-tank weapons, and a high-velocity 76mm gun was in demand.

75mm ammunition – these fixed rounds came unfixed, sometimes even in their travel packaging. They wanted this fixed. They wanted the WP shells ballistics to match the ballistics of the common HE shell.

Large caliber cartridge cases – Steel cases for the 75mm rounds for the M3 gun were well received and proved more durable. This was not the case for 105mm howitzer rounds.

105mm howitzer armed tanks – This was not a popular notion because the M7 105mm GMC was inaccurate when used for direct fire to support infantry assaults. The new weapons board did not agree, and plans for this vehicle were already in motion, and it would be well liked once issued.

Tank Officers – they wanted a tanker officer in the high-level headquarters to advise Division and higher level officers the best way to use tanks. AA and Tank destroyer officers were already an accepted part of these HQ staffs.

the 17-pdr gun – There was more interest in using this gun in M10s since the install was much simpler, the Sherman install was complicated and cramped and the Army was leary.

Tank Tracks – They show up again and the plain rubber block tracks could wear out in 250 miles in rocky terrain and lacked good off-road traction, and the using arm felt they were only good for training on roads. The T54E1 steel chevron type was preferred and much more durable, but the T48 rubber chevron would work in the MTO but wore out faster than steel types. The T49 bar cleat was also not good on sidehill terrain. The using arm wanted a wider center guided track in the MTO because the side guided tracks on the Sherman were prone to throwing on irregular and rocky side slopes. Extended end connectors were well received by the using arms.

Tank Suspension – Sherman suspension was found to be durable, with few volute springs failing. The biggest problem was the bogie wheels since the rubber tires had an erratic failure rate, and unlike the spring failures, usually sidelined the tank.

Ammunition stowage – They using arms were not interested in changes that reduced the number of ready rounds. The turret ready racks were very popular and crews did not like their removal with the ‘quick fix’ mods. They were willing to risk the higher fire chance, for the faster rate of fire the early storage setup allowed. The crews did not get their way on this one, at least until the M26 went into production.

The Radios – They wanted a better radio in the M32 recovery vehicles and better, more comfortable headphones for the armor crews.

The M10 GMC – This TD was very popular, and received high praise all around. The using arm did not require a replacement, just improved M10s. ♠ One thing to note, most M10 GMCs in MTO lacked the Azimuth indicator and range quadrant. Since the M10s get used as artillery a lot in the MTO, they would like replacements to have them.

M10 in Italy.

Replacement gun tubes – The using arms were very annoyed, that all type of gun barrels from machine gun and mortar, to tank and artillery, were dispensed at a very miserly rate. The using arm argued replacement barrels should be bought at the rate that took into consideration how much ammunition for the same weapon was produced.

Improved fire control for all relevant vehicles – They wanted built-in rangefinders, or portable ones supplied. Better periscope and telescope sights and all vehicles that could be used for indirect fire to receive the full suite of tools to perform the task. I had never heard that some Shermans did not get these automatically. I’m not sure why some Shermans and TDs didn’t have the Azimuth indicator M19 and elevation quadrant M9. Maybe the crews dumped them to save space, maybe the tanks were rushed and built and approved without them I’ll try and find out. They mention 75% of the tanks in England had these items, but less 50% had them in the MTO. Tank units were much more commonly used for indirect fire in the MTO than they would be in the ETO.

Engines – The R975C-1 was getting around 200 hours before needing replacement. This was fine with the using arm, though they would like 60 to 100 more horsepower. The R975 needed little maintenance to reach the expected 200 hours and many run much longer. The lack of liquid cooling system has some advantages.

Powertrain – There was a higher than expected rate of clutch failure in the desert campaigns. The clutch system was also improved on the production like with improved leverage to lower the clutch pedal pressure. Many MTO units did not receive the improved clutches or linkages. The better clutches lead to better transmission life and better shifting, and even without the improved clutches, transmission life went up in Italy. The powertrain offered excellent service and generally outlived the engines by several overhauls if not damaged.

Crew comfort – the Driver and Co-drivers seats in the Sherman were found to be ok, but higher seat backs were requested along with deeper seat cushions. The Gunners seat was found to be ok but could use the same improvements as the driver’s seats but the Command and Loaders seats were deemed all but useless. These would be improved in the later models of the Sherman and various TDs. Crews do not use their seatbelts, fearing it complicating bailing out, and more padding inside was not wanted because the crews felt it was a fire hazard. The M4 and M4A1 tanks were praised for good ventilation. There was also some discussion about the value of turret baskets, and if they were needed at all.

Ammo Storage – The early Sherman ready racks in the turret were well liked by the using arms, but they felt the sponson and hull ammo racks were no good and didn’t support the 75mm Shells enough. They would often separate and dump a bunch of gunpowder inside the tank making a deadly mess to clean. The using arm tends to stuff the tank with extra rounds, adding to the shell durability problems. These problems would be addressed in the second gen improved hull tanks.

General storage – The current storage space on the Sherman was deemed ok, but better, easier to access bins were requested. They also wanted any storage in the floor to be resistant to getting filled with dirt or water.

Machine guns – The bow machine gun saw a lot of use, but its usefulness would be improved by a sighting system. One was in the works, but not at the point of this report. The M1919 machine guns, both bow, and co-ax were reliable as long as the crew was careful with the ammo. Long road trips could vibrate rounds loose in the belts and cause problems, but under normal conditions, this was rarely a problem with well-trained crews. The crews wanted a better adjustment method for matching the co-ax gun to the gunner’s site, the current one was not very good. The .50 AA mount was not well liked or considered important. Requests were made for a better mount for ground targets.

Turret hatches – The current split hatch was deemed ok, but the crews like the looks of the new all around cupola and were also enthusiastic about a loader’s hatch on the new 76 armed tanks.

Armor – There does not seem to be a consensus on how much armor a tank should have by the using arms. Armored Force troops felt the current level on the Sherman was fine, but wouldn’t mind more as long as it did not negatively affect flotation, maneuverability, and speed. ♠The British generally wanted heavier armor than the US Army. ♠♠Combat in Italy showed the differential was taking more hits than anything, and another request was made for add-on armor for the area.

Sand Shields – The general consensus on these was they were useless in any theatre and needed to be redesigned. They needed to be easier to install, and designed to not trap mud.

Flotation – The using arms wanting tanks around 10 pounds per square inch. This was very optimistic since even the HVSS Shermans came in around 11 PSI, the basic 75 VVSS Sherman around 13. It seems the Germans flooded fields in Sicily and Italy when they retreated, and Shermans got bogged down most of the time. They offered the suggestion of just stretching the Sherman since more length would help, and the British M4A4 tanks, the longest production Shermans, had no maneuverability issues.

Maneuverability – In the US Army there was a desire across the board for more maneuverability, in tanks. One thing to keep in mind though is the tanks in the MTO were older and most had single anchor steering brakes, the double anchor made the tanks easier to maneuver requiring less lever pressure. The ability to skid turn was not something US troops seemed interested in.

Accessories – The troops had a lot of feedback here. ♠ The instruments and gauges in medium tanks were not good quality, if they worked they didn’t work long. Oil pressure gauges fail, and no one worries about the motor until both oil pressure gauges die and a low oil pressure light comes on. This seems to be US feedback, I don’t recall hearing complaints from the Brits about Gauge quality. I wonder if the different tank plants sourced gauges from different companies. ♠♠ The compasses on US tanks would not stay calibrated. This would be a very annoying problem but eventually solved on second gen Shermans. ♠♠♠ Armor for the air cleaners on the M4 and M4A1 comes up again. ♠♠♠♠ The Auxiliary giving good service, and are well liked, but the using arms would like the area around the fuel tank filler for the Aux motor to be waterproofed better. They also noted replacements were hard to come by.

Modifications – ♠ The jist on this one was, in many cases modifications can be seen by inspecting a vehicle, but in others, access panels or more might have to be removed to check. The using arms proposed a record imprinted on a brass plate, attached to the vehicle, listing all the modifications that had been applied. ♠♠ They also wanted to emphasize that they did not want any modifications that would not ‘materially increase the efficiency of the vehicles’

Development – The using arms were curious about the items in development, and finding out a large organization was working to improve almost everything was a morale booster. There was also interest in the T-20 series and if any test vehicles would be sent over for some for feedback like the M4A1 prototype has been.

Information and feedback on future equipment.

The M4E6 or pre-production M4A1 76w – ♠ This improved version was well liked by everyone who checked it out. The bigger turret was a big hit, though not much bigger, it seemed roomier. ♠♠ The improved fire control gear was very well liked and considered an ‘outstanding improvement’. The 76mm gun was well liked, and everyone seemed to agree needed. ♠♠♠ The only real concern was the less effective HE round, but it was hoped they would make a better one.

The M18 76mm GMC – The first and bad impression this vehicle lefts was it had no armor, and seemed very mechanically complicated. The fire control gear was well liked. When the vehicle was demonstrated, the tracks and unthrowable tracks also got a lot of attention. No one was sure if the speed would be useful, but the maneuverability was well liked. ♠ The same story with interest in deployment, not as a replacement vehicle, but fulling trained units from the ZI would be ok. ♠♠ This vehicle was not wanted by M10 units already deployed. Units equipped with it in the ZI then deployed were better received, the M10 was still more popular. An M10 with a 90mm gun was the preferred replacement.

M4A3 75W – Even though the Ford GAA was a big improvement, it was not enough of an improvement to take them on as replacement vehicles. They were fine for them to be brought with units already fully trained on them.

The M1 Dozer blade kit – This kit was an instant hit and would have many uses, including clearing rubble after heavy artillery reduced a strong point. Currently, this has to be done by an unarmored bulldozer and casualties were high. it was hoped they would work well enough to help tanks dig in or SPG prepare a position. ♠ Through testing, they found this kit could be installed on any Sherman tank type.

♠

This report goes into detail in the appendixes listing all the items demonstrated, and where they were demonstrated. They also include data on how many of the various items demonstrated were ordered by the various theatres.

I think it’s pretty clear the MTO was a backwater. The general shortage of spare parts in the MTO and a shortage of personnel to staff the proper echelons of repair and salvage system are also indicators of this. As they got ready for the June of 44 landings, the troops in England would be getting top priority and supplies and spares.

There is a lot of info on other weapons like artillery and small arms, not directly Sherman related and therefore, uncovered here. The report is definitely worth a download and re through. I think it offers a good insight into the thinking involved on not swapping to 76mm armed Shermans before the Normandy landings.

US Army M4 crew, probably somewhere in the ETO or MTO. The crew are wearing a HBT coverall that was not all that popular. Later they would would wear the same things the infantry did. Being color you can see the black on OD green camo used, and a red air ID panel on the back of the tank. The top hat was not standard issue. M4 Crab, with the 739th TB.British Sherman V based Crab, 1944.M4 Crab Breinig 1944. A Sherman IC Firefly probably with the British 11th Armored Division, in the town of Putanges, 20 August 1944.A captured M4A1 75 tank, an early DV model, being tested by the Nazis. This tank was probably captured in North Africa.An M4A4 based Crab up survives to this day in Canada.An M4A2 75 large hatch tank, this is one of the rare dry ammo rack large hatch tanks. It must have been going pretty fast when it hit that mud, note the tanker bar on the left about to fall off.An M4A3 76w HVSS tank is climbing up a muddy road in this HUGE image. Note the commander has a 1919 mounted in front of him. The caption says 11th US Armored Division Einheiten Der Germany 1945. You can see a Jumbo and another A3 76 tank , this one VVSS in the background.M4 Sherman with a M1 Dozer blade drivers through a whole in the Siegfried lines Tank Trap belt. The tank is a M4 75. Close up of the T34 Calliope, being loaded by the crew, it shows lots of detail of the T34 installation. This is an M4 Sherman in Italy that hit a large Anti tank mine, or maybe a pair of them in the same hole. The tank is a DV tank, with an M34 gun mount. This picture was taken during the staging in the UK just before 6 June 1944. Note the left-hand tank has the characteristic arm for mounting a dozer blade (barely visible running along the suspension); the hydraulic jack and blade are missing. 741st Tank Battalion after action reports indicate that among the eight dozer tanks they had scheduled to land in Wave 2, one of them, commanded by LT Kotz, did not have a blade attached. The 741st’s tanks on Omaha Beach came in three flavors. B and C companies had DD tanks. Co. A had M4A1 tanks and the tank dozers (six of their own and two from the 610 Engineer Company) were M4A3s, if I am not mistaken. If these are 741st tanks, then the photo was taken at the Portland ‘hards’ in the UK, where they out-loaded. Also note the M8 armored ammunition trailer. Each of the eight LCTs carrying Co. A embarked two standard tanks and a dozer tank. They also carried an engineer gap assault team and towed an LCM behind. Off the Normandy coast, the engineers boarded their LCM and followed the LCT ashore, where the dozer tank was supposed to support and work under the direction of the gap assault team leader. Also, on the way in, the two standard tanks were to fire over the LCT’s bow ramp, providing suppressive fire as they neared the beach. The ammo trailers were there to ensure they had plenty to shoot. One pair of Co. A’s tanks reported firing 450 rounds of 75mm on D-Day. Love your site. Caption Info, thanks to Chuck Herrick.M4A3 or A2 76w Sherman somewhere in Europe 1945, that almost looks like Soviet numbering on the side of the turret. A pair of M4 small hatch 75mm tanks coming off an LST-77 at Anzio, Italy, May 1944; note the small barge capsized in the background.A line of French Sherman tanks in Paris after the city was liberated by French forces. The tanks are a mix of small and large hatch Shermans, one is a M4 or M4A3 105 and there is a 76 gun sticking out down the row. Vive La France!An UK M4 and an M4A1 pass through a fence in an urban area. It could be an M4A4 in front I suppose. M4A4 Crab. Another Sherman Crab. M4A3 based flamethrower tank, probably with the Marines on Iwo Jima. These tanks used a Navy Mark 1 Flame-Thrower. M4A1 76w with extra plate armor added to the front hull, it’s from the 3rd Armored Division on the outskirts of Korbach 30 March 1945, also note the Commanders and loaders hatches have been swapped. There is also a pair of boxing gloves hanging on the front armor! An M4A1 76w and an M4A3E2 Jumbo of the 3rd Armored Division, probably during the Battle of Hürtgen Forest. 14th Armored Division M4A1 76W with sandbags, the tank has a threaded and capped M1A1 gun and the split loaders hatch. M4A1 North Africa, 1943, the tank appears to be rather dirty. M4 based Scorpion mine clearing tank.M4 Sherman coming out of a gully, this is a command tank, note the extra antenna on the front right of the hull. Soviet M4A2 75’s crew play an accordion and pal around. This tank is another rare large hatch hull with dry ammo racks, you can make out the armor over the ammo racks on t he side of the hull. Most, it not all of these tanks went to Russia. Also note the drivers side head light and guard are nearly ripped off. A pair of M4A2 76w Shermans serving with the Soviets, these tanks are just like the one above. Crewmen of a M4A3 76w Sherman loads ammo into the floor ammo racks. The manual says the rounds should be stored nose up.

Gallery III: Even More Random High Resolution Sherman and Lee Photos with Comments.

British or French M4A2 tanks in the desert. Probably training in North Africa. Convoy of tanks, trucks and jeeps from the100th ID, and 781st TB, the photo isn’t detailed enough to get a specific make on the Shermans. This M4A1 76w is from A Company, 20th Tank Battalion , 20 Armored Division. They are on the outskirts of Cailly, France on February 24th, they had arrived in country a few days before and had not seen combat yet. The crew is unpacking and taking inventory of all the gear issued with the tank, they probably received the tank with the back deck covered in the boxes. Agroup of Doughs gathered around the rear of an M4A3 76w, probably somewhere in Germany in 1945. Note how much stuff they have strapped to the back deck. 1st Marine Tank Battalion, Okinawa 1945. notice all the extra stuff on the tank. The Marston matting on the hatch is to keep the Japanese infantry from putting a satchel charge or worse right on top of the periscope, a fairly weak spot. They also had magnetic mines they could put on the side of the tank on I bet the matting on the side helped prevent that. Wood and concrete was also used. It must be the angle, but the pistol port almost looks like it’s missing. An M10 serving in the 2nd French Armored Division Hallville France November of 1944.AFrench M4A3 76w or M4A2 76w of second company of the 501st Tank Regiment. The French used almost all versions of the Sherman, so without seeing the engine deck, I can’t tell for sure what model it is. M4 Sherman tank named Bell of Little rock, and a Lt R Hoffman looking it over, January of 1944, oddly I can’t find out what unit this tank was with. This seems to be concrete going over sandbags. The tank is either an M4A1 76w or an M4A3 76W. If you have any other info on this image let me know.M4A4s on the Burma road. How cool is it to see M4A4 tanks on the Burma road? These M4A4s were probably fairly late production A4s, that had been used in the US for training then overhauled and shipped to the UK. Some M4A4 tanks ended up back in US hands in the CBI when a composite US/Chinese tank unit needed some mediums. Not the lead tank has some kind of windscreen up for the driver and how heavily loaded the tanks are. Behind a destroyed British Sherman M4 near Caen in Normandy, a fascist soldier, of the criminal, Waffen SS watches the enemy line. Date: 1944 The Tank if either an Ic or Vc Firefly, probably the latter since it was the most common Firefly type.Our Soviet allies(at the time) using a Lend Lease M4A2 76w. I have no idea what unit these Russian Soldiers are from, but if someone does, let me know. I bet they killed a lot of Nazis to get to there, there being somewhere in Germany 1945Soviet Lend Lease M3 Lee knocked out. The Germans on it seem to be using it like a jungle gym, though something less wholesome could be going on since some of the fascist, criminal, invaders are in various states of dress.During a pre war training exercise this M3 Lee collapsed this bridge. The crew is helping the local kids get across so they can get to school. I love this image!This British M3 Grant Crew is setting up to spend the night in the desert, in egypt, in 1942. I do not understand why two of them are naked. Note the .30 1919 on the roof, and the canvas mantlet cover on the 75mm. This is the Production pilot of the M3 Lee, photo may have been taken during the demonstration for the factory workers, where the Lee took out an empty Guard shack by accident, by running it over. Clearly tanks and bridges are not fond of each other. This M4A3 76w HVSS tank seems to have been a tad much for this one. It was also a German bridge, so it was probably complicated, just adequate for the Job, and prone to failure. =DAnother shot of the prototype Lee at Aberdeen Proving ground.Another Lend Lease M4A2 76w being used by the Soviets. These tanks were well liked by the Russian crews, they felt they were very lavishly equipped. They were not fond of the .45 ACP round or the submachine guns that used them, and that these tanks came with. Even more Russian M4A2 76w tanks, the Russian crews called them ‘Emchas’ and they were unhappy to have to give them up when the war ended. In some case they didn’t, and converted them to tractors. Even more even more Russian M4A2 76w tanks, of the various engine types the Sherman could come with, the only ones the Russian would accept were the diesel based M4A2 tanks. French M4A2 coming off an LST, this one is with the 12e RCC, 2e Division Blindee. This was a very famous French Armored Division commanded by the General Philippe LeClerc. This photo was taken on 2 August 1944, on Utah beach. Vive la France!Fascist troops using a knocked out M4 as a resting spot. These may have been taken in Italy. This huge image is of Sherman M4A2 tanks with the French 12e Regiment De Chasseurs D’Afrique, part of the 2e Division Blindee, commanded by General Philippe LeClerc, taken August of 44 in Normandy. Vive la France!

These were a pain in the rear to make, the ones in the back of my copy of Hunnicutt are very bad, so I have reproduced some in Word, and then print them out as PDFs, then take a screen shot of the PDF for this post. I have now hosted all the PDF files, if you want something with copy and pasteable text. I’ve got a system not for these and it’s semi easy to do, so I will keep adding them. I also added at least one, and up to five images with each spec sheet, of the Sherman the spec sheet is for. You can click to enlarge all these images, the sizes very.